Sociology
The One-Child Policy Legacy and Gender Imbalances in China
Quick fact
As a result of the one-child policy, China's sex ratio at birth soared to about 120 boys for every 100 girls by 2005, meaning millions of girls were either aborted or unregistered.
Why this is interesting
You've probably heard that China's one-child policy was about controlling population, but did you know it also led to millions of 'missing women'?
Read the full explanation
Understanding The One-Child Policy Legacy and Gender Imbalances in China
Imagine a policy that limits each family to just one child. Now imagine a society that has strongly preferred sons for centuries. The one-child policy was designed to curb rapid population growth, but by limiting families to a single child, it collided with the deep-rooted cultural preference for sons. Families who wanted a son but were allowed only one child often turned to prenatal sex selection (aborting female fetuses) or, in earlier years, practiced female infanticide or simply underreported female births. This combination of a strict fertility limit and a strong son preference resulted in a rapidly skewed sex ratio at birth: more boys being born than girls. This is not just a number; it means today there are millions of men who cannot find wives because there simply aren't enough women. This imbalance has profound effects on family structures, migration, and social stability.
A deeper explanation
The mechanism behind the gender imbalance is a clear interaction between a normative policy and a cultural preference. The one-child policy, enforced through economic penalties and administrative controls, limited most couples to a single birth. However, the cultural norm of son preference – driven by patrilineal inheritance, ancestor worship, and the expectation that sons will care for aging parents – meant that many couples wanted their one child to be a boy. With the availability of prenatal ultrasound and selective abortion, many couples at that time chose to terminate female fetuses. There is also evidence of underreporting of female births to avoid penalties when a family tried to have another child in hopes of a son. This sex-selective behavior is a specific form of 'son preference' materializing through fertility control. The biological baseline for the sex ratio at birth is roughly 105 males per 100 females. In China, it reached around 120:100 in the 2000s, indicating that roughly 10-15% of female births were missing. The long-term consequence is a huge surplus of males across the country – the 'missing women' phenomenon (a term coined by Amartya Sen). This surplus of men has led to a phenomenon called the 'marriage squeeze', where a substantial cohort of men cannot find partners. This has been associated with increased social instability, human trafficking, and a rise in the number of bachelors, particularly in rural areas. The legacy persists even after the policy was replaced by a two-child policy in 2015 and a three-child policy in 2021. The effects of the imbalance are felt in the marriage market and will continue to shape China's demography and society for decades.